Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40
The AirTAC Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40 is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø80mm bore and 80mm stroke, G3/8 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ80 mm
- Stroke80 mm
- Port sizeG3/8
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40
The AirTAC SAIJ80X80-40 is a double-acting ISO 15552 profile cylinder featuring a rear stroke adjuster that creates a 40-80 mm usable travel window. It delivers a robust 2513 N push force at 0.5 MPa, making it ideal for heavy-duty positioning tasks. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting of CMSE or DMSE switches.
This specific configuration is built with a SUS304 stainless steel rod for superior corrosion resistance and uses PT tapered port threads. The rear adjuster acts purely as a mechanical stop to fine-tune the retract end position during commissioning; it does not lock the load, meaning live air pressure is required to hold position.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40 Technical Specifications
| Model | Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40 |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø80 mm |
| Stroke | 80 mm |
| Acting type | Double acting |
| Port size | G3/8 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø80mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 2513 N | 2268 N |
| 0.7 MPa | 3519 N | — |
| Max (@1.0 MPa) | 513 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 80 | Bore size in mm. |
| ×80 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40 Is Used
Machine Changeovers
Dial in the retract position from 40 to 80 mm during product size changeovers without swapping out the entire cylinder or adding external stopper blocks.
Fixture Positioning
Use the 2513 N push force at 0.5 MPa to securely clamp variable-width workpieces, using the rear screw to fine-tune the exact clamping depth.
Assembly Line Setup
Perfect for commissioning new equipment where the exact end-of-stroke datum needs slight field adjustment to align with upstream conveyors or tooling.
Is the Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40 the Right Cylinder?
Choose this 80 mm bore cylinder when your application requires substantial force (2513 N push at 0.5 MPa) but the exact end-of-stroke position varies by product or fixture. The 40 mm adjustment range allows you to dial in the travel without adding external stops. If you need less force, stepping down to a 63 mm bore yields 1559 N, while moving up to a 100 mm bore provides 3927 N.
Because the nominal stroke is 80 mm, side-load stress is minimal, but the 25 mm rod and M20x1.5 thread handle high bending loads well. For load-holding without continuous air pressure, this plain SAIJ cylinder is insufficient—consider an AirTAC SAIL or BSAI series with a mechanical lock instead. When replacing an ISO 15552 cylinder, match the 80 mm bore, 80 mm stroke, PT G3/8 ports, and the desired mounting interface from the SAIJ subset (Basic, FA, LB, TC, FTC, TCM1, TCM2).
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ80 Adjustable Cylinder SAIJ80BX80-40 FAQ
At 0.5 MPa operating pressure, this 80 mm bore cylinder provides 2513 N of push force and 2268 N of pull force. At the maximum 1.0 MPa pressure, it can deliver up to 513 kgf of push force.
The -40 designation means the rear adjuster can shorten the nominal 80 mm stroke by up to 40 mm, giving an effective travel window of 40 to 80 mm. The adjuster acts as a mechanical stop and does not function as a lock to hold the load without air pressure.
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